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  <title>Boost Concept Checking Reference</title>
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  <h2><a name="reference" id="reference">Reference</a></h2>

  <ol>
    <li><a href="#macros">Macros</a></li>

    <li><a href="#basic-concepts">Basic Concept Checking Classes</a></li>

    <li><a href="#iterator-concepts">Iterator Concept Checking
    Classes</a></li>

    <li><a href="#function-object-concepts">Function Object Concept Checking
    Classes</a></li>

    <li><a href="#container-concepts">Container Concept Checking
    Classes</a></li>

    <li><a href="#basic-archetype">Basic Archetype Classes</a></li>

    <li><a href="#iterator-archetype">Iterator Archetype Classes</a></li>

    <li><a href="#function-object-archetype">Function Object Archetype
    Classes</a></li>

    <li><a href="#container-archetype">Container Archetype Classes</a></li>

    <li><a href="#deprecated-functions">Deprecated Functions</a></li>

    <li><a href="#deprecated-macros">Deprecated Macros</a></li>

    <li><a href="#deprecated-concept-checking-classes">Deprecated Concept
    Checking Classes</a></li>
  </ol>

  <h3><a name="macros" id="macros">Macros</a></h3>
  <pre>
#include "boost/concept/assert.hpp"

BOOST_CONCEPT_ASSERT((<em>concept checking class template specialization</em>));
</pre>

  <p><strong>Effects:</strong> causes a compilation failure if the concept is
  not satisfied.<br />
  <strong>Note:</strong> this macro can be used at global, class, or function
  scope.</p>

  <pre>
#include "boost/concept/requires.hpp"

<font color="gray">template &lt;…<em>template parameters</em>…&gt;</font>
BOOST_CONCEPT_REQUIRES(
  ((<em>concept checking class template specialization<sub>1</sub></em>)) 
  ((<em>concept checking class template specialization<sub>2</sub></em>))… 
  ((<em>concept checking class template specialization<sub>n</sub></em>))<strong>,</strong>
  (<em>function return type</em>)
) <font color="gray"><em>function_template_name</em>(…<em>function parameters</em>…)</font>
</pre>

  <p><strong>Effects:</strong> causes a compilation failure if the
  given concepts are not satisfied.<br />
  <strong>Note:</strong> this macro is intended to be used in place of
  a function template's return type.</p>

  <h3><a name="basic-concepts" id="basic-concepts">Basic Concept Checking
  Classes</a></h3>
  <pre>
#include "boost/concept_check.hpp"

template &lt;class T&gt;
struct Integer; // Is T a built-in integer type?

template &lt;class T&gt;
struct SignedInteger; // Is T a built-in signed integer type?

template &lt;class T&gt;
struct UnsignedInteger; // Is T a built-in unsigned integer type?

template &lt;class X, class Y&gt;
struct Convertible; // Is X convertible to Y?

template &lt;class T&gt;
struct <a href=
"../utility/Assignable.html">Assignable</a>; // Standard ref 23.1

template &lt;class T&gt;
struct SGI<a href=
"http://www.boost.org/sgi/stl/Assignable.html">Assignable</a>;

template &lt;class T&gt;
struct <a href=
"http://www.boost.org/sgi/stl/DefaultConstructible.html">DefaultConstructible</a>;

template &lt;class T&gt; 
struct <a href=
"../utility/CopyConstructible.html">CopyConstructible</a>; // Standard ref 20.1.3

template &lt;class T&gt; 
struct <a href=
"http://www.boost.org/sgi/stl/EqualityComparable.html">EqualityComparable</a>; // Standard ref 20.1.1

template &lt;class T&gt;
struct <a href=
"../utility/LessThanComparable.html">LessThanComparable</a>; // Standard ref 20.1.2

template &lt;class T&gt;
struct Comparable; // The SGI STL <a href=
"http://www.boost.org/sgi/stl/LessThanComparable.html">LessThanComparable</a> concept
</pre>

  <h3><a name="iterator-concepts" id="iterator-concepts">Iterator Concept
  Checking Classes</a></h3>
  <pre>
template &lt;class Iter&gt;
struct <a href=
"http://www.boost.org/sgi/stl/InputIterator.html">InputIterator</a>; // Standard ref 24.1.1 Table 72

template &lt;class Iter, class T&gt; 
struct <a href=
"http://www.boost.org/sgi/stl/OutputIterator.html">OutputIterator</a>; // Standard ref 24.1.2 Table 73

template &lt;class Iter&gt; 
struct <a href=
"http://www.boost.org/sgi/stl/ForwardIterator.html">ForwardIterator</a>; // Standard ref 24.1.3 Table 74

template &lt;class Iter&gt; 
struct Mutable_ForwardIterator;

template &lt;class Iter&gt; 
struct <a href=
"http://www.boost.org/sgi/stl/BidirectionalIterator.html">BidirectionalIterator</a>; // Standard ref 24.1.4 Table 75

template &lt;class Iter&gt; 
struct Mutable_BidirectionalIterator;

template &lt;class Iter&gt; 
struct <a href=
"http://www.boost.org/sgi/stl/RandomAccessIterator.html">RandomAccessIterator</a>; // Standard ref 24.1.5 Table 76

template &lt;class Iter&gt; 
struct Mutable_RandomAccessIterator;
</pre>

  <h3><a name="function-object-concepts" id=
  "function-object-concepts">Function Object Concept Checking
  Classes</a></h3>
  <pre>
#include "boost/concept_check.hpp"

template &lt;class Func, class Return&gt;
struct <a href="http://www.boost.org/sgi/stl/Generator.html">Generator</a>;

template &lt;class Func, class Return, class Arg&gt;
struct <a href=
"http://www.boost.org/sgi/stl/UnaryFunction.html">UnaryFunction</a>;

template &lt;class Func, class Return, class First, class Second&gt;
struct <a href=
"http://www.boost.org/sgi/stl/BinaryFunction.html">BinaryFunction</a>;

template &lt;class Func, class Arg&gt;
struct Unary<a href=
"http://www.boost.org/sgi/stl/Predicate.html">Predicate</a>;

template &lt;class Func, class First, class Second&gt;
struct <a href=
"http://www.boost.org/sgi/stl/BinaryPredicate.html">BinaryPredicate</a>;

template &lt;class Func, class First, class Second&gt;
struct Const_BinaryPredicate;

template &lt;class Func, class Return&gt;
struct <a href=
"http://www.boost.org/sgi/stl/AdaptableGenerator.html">AdaptableGenerator</a>;

template &lt;class Func, class Return, class Arg&gt;
struct <a href=
"http://www.boost.org/sgi/stl/AdaptableUnaryFunction.html">AdaptableUnaryFunction</a>;

template &lt;class Func, class First, class Second&gt;
struct <a href=
"http://www.boost.org/sgi/stl/AdaptableBinaryFunction.html">AdaptableBinaryFunction</a>;

template &lt;class Func, class Arg&gt;
struct <a href=
"http://www.boost.org/sgi/stl/AdaptablePredicate.html">AdaptablePredicate</a>;

template &lt;class Func, class First, class Second&gt;
struct <a href=
"http://www.boost.org/sgi/stl/AdaptableBinaryPredicate.html">AdaptableBinaryPredicate</a>;
</pre>

  <h3><a name="container-concepts" id="container-concepts">Container Concept
  Checking Classes</a></h3>
  <pre>
#include "boost/concept_check.hpp"

template &lt;class C&gt;
struct <a href=
"http://www.boost.org/sgi/stl/Container.html">Container</a>; // Standard ref 23.1 Table 65

template &lt;class C&gt;
struct Mutable_Container;

template &lt;class C&gt;
struct <a href=
"http://www.boost.org/sgi/stl/ForwardContainer.html">ForwardContainer</a>;

template &lt;class C&gt;
struct Mutable_ForwardContainer;

template &lt;class C&gt;
struct <a href=
"http://www.boost.org/sgi/stl/ReversibleContainer.html">ReversibleContainer</a>; // Standard ref 23.1 Table 66

template &lt;class C&gt;
struct Mutable_ReversibleContainer;

template &lt;class C&gt;
struct <a href=
"http://www.boost.org/sgi/stl/RandomAccessContainer.html">RandomAccessContainer</a>;

template &lt;class C&gt;
struct Mutable_RandomAccessContainer;

template &lt;class C&gt;
struct <a href=
"http://www.boost.org/sgi/stl/Sequence.html">Sequence</a>; // Standard ref 23.1.1

template &lt;class C&gt;
struct <a href=
"http://www.boost.org/sgi/stl/FrontInsertionSequence.html">FrontInsertionSequence</a>;

template &lt;class C&gt;
struct <a href=
"http://www.boost.org/sgi/stl/BackInsertionSequence.html">BackInsertionSequence</a>;

template &lt;class C&gt;
struct <a href=
"http://www.boost.org/sgi/stl/AssociativeContainer.html">AssociativeContainer</a>; // Standard ref 23.1.2 Table 69

template &lt;class C&gt;
struct <a href=
"http://www.boost.org/sgi/stl/UniqueAssociativeContainer.html">UniqueAssociativeContainer</a>;

template &lt;class C&gt;
struct <a href=
"http://www.boost.org/sgi/stl/MultipleAssociativeContainer.html">MultipleAssociativeContainer</a>;

template &lt;class C&gt;
struct <a href=
"http://www.boost.org/sgi/stl/SimpleAssociativeContainer.html">SimpleAssociativeContainer</a>;

template &lt;class C&gt;
struct <a href=
"http://www.boost.org/sgi/stl/PairAssociativeContainer.html">PairAssociativeContainer</a>;

template &lt;class C&gt;
struct <a href=
"http://www.boost.org/sgi/stl/SortedAssociativeContainer.html">SortedAssociativeContainer</a>;

template &lt;class C&gt;
struct <a href=
"../utility/Collection.html">Collection</a>;
</pre>

  <h3><a name="basic-archetype" id="basic-archetype">Basic Archetype
  Classes</a></h3>
  <pre>
#include "boost/concept_archetype.hpp"

template &lt;class T = int&gt;
class null_archetype; // A type that models no concepts.

template &lt;class Base = null_archetype&gt;
class default_constructible_archetype;

template &lt;class Base = null_archetype&gt;
class assignable_archetype;

template &lt;class Base = null_archetype&gt;
class copy_constructible_archetype;

template &lt;class Base = null_archetype&gt;
class equality_comparable_archetype;

template &lt;class T, class Base = null_archetype&gt;
class convertible_to_archetype;
</pre>

  <h3><a name="iterator-archetype" id="iterator-archetype">Iterator Archetype
  Classes</a></h3>
  <pre>
#include "boost/concept_archetype.hpp"

template &lt;class ValueType&gt;
class trivial_iterator_archetype;

template &lt;class ValueType&gt;
class mutable_trivial_iterator_archetype;

template &lt;class ValueType&gt;
class input_iterator_archetype;

template &lt;class ValueType&gt;
class forward_iterator_archetype;

template &lt;class ValueType&gt;
class bidirectional_iterator_archetype;

template &lt;class ValueType&gt;
class random_access_iterator_archetype;
</pre>

  <h3><a name="function-object-archetype" id=
  "function-object-archetype">Function Object Archetype Classes</a></h3>
  <pre>
#include "boost/concept_archetype.hpp"

template &lt;class Arg, class Return&gt;
class unary_function_archetype;

template &lt;class Arg1, class Arg2, class Return&gt;
class binary_function_archetype;

template &lt;class Arg&gt;
class predicate_archetype;

template &lt;class Arg1, class Arg2&gt;
class binary_predicate_archetype;
</pre>

  <h3><a name="container-archetype" id="container-archetype">Container
  Archetype Classes</a></h3>
  <pre>
UNDER CONSTRUCTION
</pre>

  <h3><a name="deprecated-functions" id="deprecated-functions">Deprecated
  Functions</a></h3>
  <pre>
#include "boost/concept_check.hpp"

template &lt;class Concept&gt;
void function_requires();
</pre>

  <p><code>function_requires()</code> has been deprecated in favor of <code>BOOST_CONCEPT_ASSERT</code>.
   This means that <del><code>function_requires< Concept<Type> >();</code></del>
   becomes <code>BOOST_CONCEPT_ASSERT((Concept<Type>));</code>
   (don't forget to <code>#include &quot;boost/concept/assert.hpp&quot;</code>).


  <h3><a name="deprecated-macros" id="deprecated-macros">Deprecated
  Macros</a></h3>
  <pre>
#include "boost/concept_check.hpp"

// Apply concept checks in class definitions.
BOOST_CLASS_REQUIRE(<i>type</i>, <i>namespace-of-concept</i>, <i>concept</i>);
BOOST_CLASS_REQUIRE2(<i>type1</i>, <i>type2</i>, <i>namespace-of-concept</i>, <i>concept</i>);
BOOST_CLASS_REQUIRE3(<i>type1</i>, <i>type2</i>, <i>type3</i>, <i>namespace-of-concept</i>, <i>concept</i>);
BOOST_CLASS_REQUIRE4(<i>type1</i>, <i>type2</i>, <i>type3</i>, <i>type4</i>, <i>namespace-of-concept</i>, <i>concept</i>);

// Apply concept checks in class definitions.
BOOST_CLASS_REQUIRES(<i>type</i>, <i>concept</i>);
BOOST_CLASS_REQUIRES2(<i>type1</i>, <i>type2</i>, <i>concept</i>);
BOOST_CLASS_REQUIRES3(<i>type1</i>, <i>type2</i>, <i>type3</i>, <i>concept</i>);
BOOST_CLASS_REQUIRES4(<i>type1</i>, <i>type2</i>, <i>type3</i>, <i>type4</i>, <i>concept</i>);
</pre>

  <h3><a name="deprecated-concept-checking-classes" id=
  "deprecated-concept-checking-classes">Deprecated Concept Checking
  Classes</a></h3>

  <p>For each of the concepts documented here, the library includes an
  identical concept checking class whose name ends in
  “<code>Concept</code>” For example, in
  addition to <code>RandomAccessIterator</code>, the library defines a
  <code>RandomAccessIteratorConcept</code> class template.</p>

  <p><a href="./concept_check.htm">Back to Introduction</a><br />
  <a href="./implementation.htm">Prev: Implementation</a><br /></p>
  <hr />

  <table>
    <tr valign="top">
      <td nowrap="nowrap">Copyright &copy; 2000</td>

      <td><a href="http://www.boost.org/people/jeremy_siek.htm">Jeremy Siek</a>(<a href=
      "mailto:jsiek@osl.iu.edu">jsiek@osl.iu.edu</a>) Andrew
      Lumsdaine(<a href="mailto:lums@osl.iu.edu">lums@osl.iu.edu</a>), 2007
      <a href="mailto:dave@boost-consulting.com">David Abrahams</a>.</td>
    </tr>
  </table>
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